. >>> romney and obama trying to l lower expectations ahead of the first presidential debate. >> he's a debater. i'm just okay. >> but romney backer chris christie didn't get the memo. >> wednesday night the first night of this campaign. >> will this be a game-changer in the election? >>> and "i'm not perfect." arnold schwarzenegger about his failed marriage, his affairs and the child he fathered with his house keeper. >> i inflicted pain on maria and unbelievable pain on the kids. >> he prepares to release his tell-all memoir today, monday, october 1st, 2012. >>> from nbc news, this is "today" with matt lauer and savannah guthrie. live, from studio 1-a in rockefeller plaza. >> and good morning, welcome to "today" on a monday morning, i'm savannah guthrie. >> i'm david gregory in for matt this morning. >>> the taliban is claiming responsibility for the deadly suicide bombing in eastern afghanistan overnight. >> they were targeting a military patrol in a crowded market. as we said, at least 14 people were killed, 3 americans among the dead. dozens were wounded. this comes one day after the u.s.